Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

If two's company, and three's a crowd, then whats four and five ?

If you say my name, I will no longer exist. What am I?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Can you name some countries which do not have the alphabet 'A' in them?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Can you decipher the below rebus?

PBLUESAISNUERSES

Buy me, smell me or deliver me, I do not change.

Who am I?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?